Folding pocket hack saw



Feb. 2,` 1943. v G. ALLEN FOLDING POCKET HAcKsAw Filed yJun@ 27, 1941 2Sheets-Sheet 2 INVENTQR, G/FFo/m ALLE/Y A-rToR/vfk Patented Feb. 2, 1943UNITED STATES PATENT OFFICE FOLDING POCKET HACK SAW Gifford Allen, GrandJunction, Colo.

Application June 27, 1941, Serial No. 399,999

Claims. (Cl. 145-33) MThis invention relates to a folding pockethacksaw, and has for its principal object the provision of a hacksawframe which will be exceedingly strong and rigid when in use, and whichcan be quickly and easily folded into a small, compact article when notin use so that it may be conveniently carried inthe pocket.

. Another object of the invention is to provide highly efficient andpositive means for attaching the hacksaw to its supporting frame.

-Other objects and advantages reside in the detail construction of theinvention, which is designed for simplicity, economy, and eliciency.These will become more apparent from the following description.

In the following detailed description of the invention reference is hadto the accompanying drawings which forms a part hereof. Like numeralsrefer to like parts in all views of the drawings and throughout thedescription.

In the drawings:

- Fig. 1 is a side View of the improved folding hacksaw illustrating itin the open position ready for use;

Fig. 2 is a fragmentary sectional view of the handle portion thereof;this section is taken on the line 2 2, Fig. 3;

Fig. 3 is a front end view thereof;

Fig. 4 is a detail view of the saw tightening block employed in theimproved saw;

;Fig. 5 illustrates the handle portion of the device with the side pad,side plate and knife sheath removed illustrating it as it would appearwhen folded' for carrying;

^ Fig. 6 is a similar View illustrating the sheath in place and thehacksaw blade in place therein;

Fig 7 is a longitudinal section through the handle, taken on the line'I-'I Fig. 6, with the blade and supporting arm removed.

Fig. 8 is a detail cross-section taken on the line 8-8 Fig. 6; and

Fig. 9 is a detail cross-section taken on the line 9-9 Fig. 5.

The improved hacksaw comprises a metal handle form I0, closed at eachside by means of relatively thin side plates I I. The side plates arecovered with hand grip pads 35. The handle form is provided with aninclined receiving socket 43 extending throughout its length and openingat the top thereof. A blade-supporting bracket I2 projects from thefront edge of the handle form Il). 4 The socket 43 is designed toslidably receive a blade arm I3. The arm is provided with a hook memberI5 which engages a stop pin III as the arm is withdrawn. The stop pinacts as a pivot about which the arm swings to its operative position.

The inner extremity of the arm contains -az notch I6 into which a latchmember II extends to hold the arm I3 in the extended position. -Thesuitable rivets or screws 22.

The outer extremity of the arm I3 is provided with a hinged saw engagingmember 23 mounted on the arm by'means of a hinge pin 24. The member 23is held at a predetermined angle- I from the arm I3 by means of a hookedlatchmember 25 which is in turn mounted on a latch pin 2li on the armI3. The hook of the latch member 25 engages in a suitable receivingnotch 36 in the saw engaging member 23 to hold it at its fixed angle.

A typical hacksaw blade is illustrated at 21 of any usual standard typehaving pin openings in its ends. At its outer extremity the blade 21slips into a receiving slot in the free extremity of the saw engagingmember 23 and a locking pin 28 is inserted through the opening in theouter end of the blade. The locking pin is carried in a swinging hingedmember 29 which is p-ivoted on the member 23 so that it may be swung toone side to release the blade 2l.

Theother extremity of the blade is detachably secured in asliding member30 mounted in the blade bracket I2. The sliding member issplitat itsouter extremity to receive the blade 2l and is longitudinally groovedalong its top and bottom to form a V-shape, guide groove 32 to guide itinto the bracket I2. The bracket is provided with'a receiving slot forthe member 30 and the parallel side edges of the slot are ridged toenter the groove 32 as shown in Fig. 9. The sliding member is moved backand forth by means of a threaded shaft 33 which projects from the member30 into a receiving pocket in the handle form IE. The shaft 33 extendsthrough a knurled nut 34. The nut 34 carries a flanged hub 3| whichenga-ges in notches in the form IIJ to prevent axial movement of thenut. Therefore by rotation of the latter the saw blade may be placedunder tension. The member 30 carries a hinged tab 3l having a blade pin38. The tab 3l is indented in the side of the member 3i) and when it isclosed the pin 38 extends through the pin hole in the end of the blade21.

A relatively flat channel member or sheath 39 is secured on the outerface of one of the side plates Il, the handle pad 35 at that side beinginternally grooved to surround the sheath. The sheath is for receivingthe saw blade when not in use. The sheath is provided with alongitudinally extending front bar 4b against which the teeth of the sawmay rest. Ears 4I project from the sheath to secure the bar 40 in placeand to engage the screws 22 to hold the sheath in place. It will benoted that the sheath is spaced from the bar 40 to allow the side set inthe saw teeth to project. The entrance opening of the sheath may besplit as shown at 42 to allow the upper edge to frictionally engage thesaw to prevent it from falling from place.

When it is desired t fold the saw the nut 34 is loosened, the hingedmembers 29 and 31 are opened to release the blade 21 from its pins 28and 38. The latch 25 is then released and the member 23 is foldedagainst the arm i3. The latch I1 is then released and the outerextremity of the blade arm is raised so that its inner extremity may beslid into the receiving socket Il as shown in Figure 5. The blade 21 isthen inserted in the sheath 39 to form a compact unit of minimum sizewhich may be easily carried in the pocket.

While the invention has been described as particularly applicable to apocket hacksaw, it is not, of course, limited to this specic use as itwill be found valuable with any type of saw and in any size to whichsuch a construction can be applied.

While a specific form of the improvement has been described andillustrated herein, it is desired to be understood that the same may bevaried, within the scope of the appended claims, without departing fromthe spirit of the invention.

Having thus described the invention, what is claimed and desired securedby Letters Patent is:

l, A folding hacksaw comprising: a handle member having a longitudinallyextending socket; an arm member slidably mounted in said socket so thatit may be slid lengthwise into or withdrawn from said socket; means forlimiting the extent of withdrawal of said arm, said latter means servingas a pivot to allow the arm to be turned to a pre-set projectedposition; a latch member in said handle member engaging said arm in thelatter position to lock the same in place; a saw engaging memberextending from the-outer extremity of the arm to a position opposite thehandle member; and means for securing a saw blade between the sawengaging member and the handle member'.

' 2. A folding hacksaw comprising: a handle member having alongitudinally extending tubular socket; an arm member slidably mountedin said socket so that it may be slid lengthwise into or withdrawn fromsaid socket; means for limiting the extent of withdrawal of said arm,said latter means serving as a pivot to allow the arm to be turned to apre-set projected position; a latch member in said handle memberengaging said arm in the latter position to lock the same in place; asaw engaging member extending from the outer extremity of the arm to aposition opposite the handle member; a latch member engaging said sawengaging member when the latter is turned to a predetermined angle; andmeans for securing a saw blade between the saw engaging member and thehandle member.

3. A folding frame for hacksaws comprising; a handle member; a tubularreceiving socket extending longitudinally within said handle member andopening to one extremity thereof; a blade arm freely slidable lengthwiseof said socket and projecting from the open extremity thereof; a hookmember adjacent the inner extremity of the forward edge of said bladearm; a pivot pin adjacent the open extremity of said socket in the pathof said hook member to be engaged by the latter to limit the withdrawalof and to serve as a pivot for said arm to allow the latter to be swungforwardly from the axis of said socket; and a blade supporting memberhingedly mounted on the outer extremity of said arm so as to projectdownwardly therefrom forwardly of said handle member, said frame being.adapted to support a saw blade between the' opposed free ends thereof.

4. A folding frame for hacksaws comprising: a handle member; a tubularreceiving socket extending longitudinally within said handle member andopening tol one extremity thereof; a blade arm freely slidablelengthwise of said. socket and projecting from the open extremity`thereof; a hook member adjacent the inner extremity of the forward edgeof said blade arm; a pivot pin adjacent the open extremity of saidsocket in the path of said hook member to be engaged by the latter tolimit the withdrawal of and to serve as a pivot for said arm to allowthe latter to be swung forwardly from the axis of said socket; a bladesupporting member hingedly mounted on the outer extremity of' said armso as to project downwardly therefrom for wardly of said handle member,said frame being adapted to support a saw blade between the opposed endsthereof, a latch member positioned to engage the inner extremity of saidarm when the latter is rotated about said pivot pin to maintain said armin its angular position; and meansv cn the exterior of said handlemember operatively connected with said latch member to release thelatter from engagement with said arm.

5. A folding frame for hacksaws comprising: a handle member; a tubularreceiving socket extending longitudinally within said handle member andopening to one extremity thereof; a.y blade arm freely slidablelengthwise of saidsocket and projecting from the open extremity thereof;a hook member adjacent the inner extremity of the forward edge of saidblade arm; a pivot pin adjacent the open extremity of saidv socket inthe path of said hook member to be engaged by the latter to limit thewithdrawal of and to serve as a pivot for said arm t0 allow the latterto be swung forwardly from the axis of said socket; a blade supportingmember hingedly mounted on the outer extremity of said armsoY GIFFQRDALLEN.

